Clock



FIG. 1 is a top plan view of a clock in accordance with our new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front side view thereof;

FIG. 6 is a rear side view thereof;

FIG. 7 is an upper front right perspective view thereof; and,

FIG. 8 is a sectional view thereof taken along line 8—8 of FIG. 6.

The broken line showings of FIG. 8 are environmental only and not part of the claimed design. 

The ornamental design for a clock, as shown and described. 